Issue I457 [ion,enhancement,resolved] Charge weighting factor (CWF) permitted range changed to [0, 1E+30]. Prior to 8.0.4-TEST20, the CWF for particles was restricted to the range [0.001, 100] (though it was still possible to use values outside this range as noted in Issue I456). As of 8.0.4-TEST20, this range has been modified to [0, 1E+30]. The original rationale for this change is related to Issue I452, where the CWF is not used for charge repulsion but rather for data recording purposes. Also, having a CWF of 0 could be useful for some circumstances, and changes made in Issue I453 now allow this. Requseted by igor-20071031 Implemented in 8.0.4-TEST20